Tapajós National Forest: Alter do Chão's Wild Side

The Tapajós National Forest (Floresta Nacional do Tapajós) is a 527,000-hectare federal conservation unit about 50 km south of Santarém, and the Jamaraquá trailhead—its most accessible entry point from Alter do Chão—sits roughly 90 minutes away by speedboat. Unlike the postcard beaches of Alter do Chão, this is primary Amazon rainforest: 60-meter samaúma trees, clearwater igarapés, and trails that see fewer than 200 visitors on a typical weekday. Entry to the forest itself is free, but you cannot hike without a credentialed local guide, and those guides charge R$100–200 per group.

Getting There and Orientation

From Alter do Chão by boat

Almost everyone visits the Tapajós National Forest as a day trip from Alter do Chão. The standard route is a speedboat from the village waterfront to the Jamaraquá community, a 1.5-hour run south along the Tapajós River that passes the beaches of Ponta do Cururu and Pindobal. Boats leave around 9 a.m. and return between 5 and 7 p.m., timed to catch the sunset on the river. Tour operators in Alter do Chão sell this as a package (roughly R$250–350 per person including guide, lunch, and boat), but you can also arrange transport directly with the Jamaraquá community association.

Do not expect a conventional ticket office at the trailhead. There is no entrance gate, no visitor center at the forest boundary, and no fixed opening hours posted. The practical cutoff for starting a trail is 11 a.m.—guides will turn you away after that because the forest gets dark by 5 p.m. and the full Jamaraquá loop takes 5–6 hours. Visits should be scheduled at least a day in advance; during high season (July–December), weekend slots fill up several days ahead.

The land route

The overland alternative runs from Santarém via the BR-163 highway to Belterra and then on unpaved roads to the community of São Domingos, about 80 km total. This route is cheaper if you have a rental car but slower in the rainy season, when the dirt sections turn to mud. Most travelers skip it. The boat is part of the experience—you pass rubber-era ruins at Pindobal and get a sense of the river's scale that the road cannot provide.

Trails, Communities, and What You Actually Do

The Jamaraquá trail

The Jamaraquá trail is the most popular route: 9.1 km round trip to the Igarapé do Paulo, with about 4 hours of walking time and 5–6 hours total including stops. The path is well-marked and moderately difficult—there are roots, a few steep sections, and one stretch where you use a rope to climb a clay bank. The payoff is a swim in the igarapé, a narrow clearwater stream that runs over white sand. Along the way, guides point out Brazil nut trees, copaíba oil trees, and a samaúma so large that 15 people holding hands cannot circle its base.

Groups are capped at 10 by ICMBio policy, and solo hiking is not permitted. The guide requirement is strictly enforced—I met a couple at the boat dock who tried to walk in alone and were sent back to Alter do Chão. The cost is worth it: my guide, a Jamaraquá resident named Sr. Pedro, identified animal tracks (tapir, agouti), explained which vines make potable water, and knew exactly where the howler monkeys would be at 3 p.m.

The Vovozona trail

For a longer, less-visited option, the Vovozona trail starts from the Maguari community and covers 14 km (7 km each way) with low elevation gain. The route passes a viewpoint, a resting shelter, a century-old samaúma known as Vovozona, and another igarapé. This trail is easier underfoot than Jamaraquá but longer—budget 6–7 hours. Fewer boats go to Maguari, so you may need to charter a private boat from Alter do Chão (around R$600–800 for the day).

Community life and crafts

Jamaraquá and Maguari are inhabited by traditional riverine families who have lived inside the forest boundaries since before the conservation unit was created in 1974. Tourism income is shared: the guide fee goes to the guide, lunch (usually fish, rice, beans, and farofa) is cooked by community women for R$30–40 per person, and the craft shops sell latex leather jewelry and woven baskets. Buy something—the latex bracelets at Jamaraquá are made from rubber tapped in the forest and cost R$15–25. This is not airport souvenir economics; the money stays in the community.

When to Go and How to Prepare

The forest changes dramatically with the water level. From July to December, the dry season, trails are firm, the igarapés are swimmable, and you can combine the hike with beach time on the way back. Water levels drop by as much as 8 meters between high and low water. From January to June, the rainy season, parts of the trail flood and some sections become impassable; the forest is lush and the crowds are gone, but you should expect mud and plan for shorter hikes. August through November is the sweet spot: dry trails, warm water, and reliable boat schedules. Temperatures hover around 26–32°C year-round, with humidity above 80%—bring at least 2 liters of water per person, and wear closed-toe shoes with good grip. Sandals are a bad idea.

What to bring: long pants (for insects and spiny palms), a swimsuit under your clothes (for the igarapé), a dry bag for electronics, insect repellent with picaridin or DEET, and cash. There are no ATMs in the communities and no card readers. The guides carry basic first aid, but the nearest hospital is in Santarém, 2 hours away by boat—declare any serious medical conditions before you go.

Frequently Asked Questions

Do I need a guide to visit the Tapajós National Forest?

Yes, a guide is mandatory for all trails. The requirement is enforced by ICMBio, and the guides are residents of the communities inside the forest who are credentialed annually. Expect to pay R$100–200 per group, not per person. You can arrange a guide through your hotel in Alter do Chão or directly with the community associations at Jamaraquá and Maguari.

How much does a day trip to the forest cost?

A package tour from Alter do Chão typically runs R$250–350 per person, covering boat transport, guide, and lunch. If you arrange things independently, you will pay about R$150 for the boat (shared among passengers), R$100–200 for the guide, and R$30–40 for lunch. Entry to the forest itself is free. Fees are subject to change—check with your operator for current rates.

What is the difference between the Jamaraquá and Vovozona trails?

Jamaraquá is 9.1 km round trip, takes 5–6 hours with stops, and is the easier and more popular option. Vovozona is 14 km round trip, takes 6–7 hours, and starts from the Maguari community, which requires a longer boat ride. Jamaraquá has more infrastructure (lunch, crafts, toilets); Vovozona sees fewer visitors and suits hikers who want a quieter day.

Can I visit during the rainy season?

Yes, but expect flooded sections on the trails and frequent rain showers. The forest is at its most lush from January to June, and you will have the place almost to yourself. Some operators suspend tours in March and April when water levels peak. Check trail conditions with your guide before booking—the Jamaraquá trail usually remains passable with detours.